Question 1

Which chamber does blood returning from the pulmonary circuit first enter in the heart?

Accepted Answer

Right atrium

Question 2

What is the primary function of the coronary circulation?

Accepted Answer

To deliver nutrients to the heart muscle (myocardium)

Question 3

Which valve prevents blood from flowing back into the left atrium from the left ventricle?

Accepted Answer

Mitral (bicuspid) valve

Question 4

If the pulmonary artery carries blood to the lungs, what type of blood does it transport?

Accepted Answer

Deoxygenated blood

Question 5

Which of the following best describes the role of the SA node pacemaker cells?

Accepted Answer

They initiate and regulate the heart's electrical impulses

Question 6

A patient has a damaged tricuspid valve. Which of the following is most likely to occur?

Accepted Answer

Backflow of blood from the right ventricle to the right atrium

Question 7

Which of the following equations correctly represents cardiac output ($$CO$$)?

Accepted Answer

$$CO = HR 	imes SV$$

Question 8

During ventricular systole, which event occurs?

Accepted Answer

The ventricles contract, ejecting blood into the arteries

Question 9

Which structure is responsible for preventing backflow of blood into the right atrium?

Accepted Answer

Tricuspid valve

Question 10

If the conduction system of the heart fails at the AV node, what is the most likely consequence?

Accepted Answer

The ventricles will contract independently and at a slower rate

Question 11

Which of the following best describes the function of the chordae tendineae?

Accepted Answer

They anchor the AV valves to prevent prolapse during ventricular contraction

Question 12

A blockage in the left coronary artery would most directly affect which part of the heart?

Accepted Answer

Left ventricle

Question 13

Which of the following is the correct sequence for the flow of blood through the heart?

Accepted Answer

Right atrium → right ventricle → pulmonary artery → lungs → left atrium → left ventricle → aorta

Question 14

Which part of the heart is responsible for pumping oxygenated blood to the systemic circulation?

Accepted Answer

Left ventricle

Question 15

What does the P wave on an ECG represent?

Accepted Answer

Depolarization of the atria

Question 16

Which of the following best explains why the left ventricle has a thicker muscular wall than the right ventricle?

Accepted Answer

It pumps blood to the entire body, requiring more force

Question 17

A patient with a malfunctioning pulmonary semilunar valve is likely to experience which of the following?

Accepted Answer

Backflow of blood from the pulmonary artery into the right ventricle

Question 18

Which vessel carries oxygenated blood from the lungs to the heart?

Accepted Answer

Pulmonary vein

Question 19

If the SA node fails, which structure can take over as the pacemaker of the heart?

Accepted Answer

AV node

Question 20

Which of the following best describes the function of the AV valves during ventricular contraction?

Accepted Answer

They close to prevent backflow into the atria

Cardiovascular System: Heart Structure and Function Study Guide

스터디 가이드 - 연습 문제